About CSS Cleaning Services. We are a family run domestic and commercial cleaning business, with a service area that covers Derby and Nottingham. We specialise in providing our clients with a tailored service at an affordable price. We have now also expanded our business to Europe and are located in the Alcobaça, Leiria region of Portugal. We are a fully insured business, with professional, dedicated, reliable and flexible staff that aim to meet all of our customer requirements.